Applications of Fiber Bragg Grating in Strain Measurement of Concrete Bridge

In order to verify the role of fiber bragg grating strain gauge in strain measurement of concrete bridge, and the influence of concrete and steel strain properties by fatigue loading, the relevant experimental researches were carried out. The results indicated that the Fiber Bragg grating strain gauge could reflect the strain regularity of concrete and steel well; for the fiber grating strain rosettes inside the concrete, the pasting equipments of fiber gratings had a certain impact of the measurement effect. The fatigue loading had a certain impact of the properties of concrete and steel, in conditions of the same number of fatigue, the greater the stress amplitude the more obvious the effects. The results analysis shown that, fiber grating strain measurement innovated the means and methods of strain measurement in detailed structure of the concrete bridge, for the strain measurements of concrete bridge under fatigue loading, the FBG could still play very good effect.

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Dynamic strain measurement using two wavelength-matched fiber Bragg grating sensors interrogated by a cascaded long-period fiber grating

Optics and Lasers in Engineering ◽

10.1016/j.optlaseng.2011.09.005 ◽

2012 ◽

Vol 50 (2) ◽

pp. 199-203 ◽

Cited By ~ 20

Author(s):

Hongbo Zou ◽

Dakai Liang ◽

Jie Zeng

Keyword(s):

Fiber Bragg Grating ◽

Strain Measurement ◽

Dynamic Strain ◽

Bragg Grating ◽

Fiber Grating ◽

Long Period Fiber Grating ◽

Fiber Bragg Grating Sensors ◽

Long Period ◽

Period Fiber Grating

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Experimental Study on Overburden Deformation Evolution under Mining Effect Based on Fiber Bragg Grating Sensing Technology

Journal of Sensors ◽

10.1155/2020/8850547 ◽

2020 ◽

Vol 2020 ◽

pp. 1-16

Author(s):

Wulin Lei ◽

Jing Chai ◽

Dingding Zhang ◽

Yibo Ouyang ◽

Zhe Ma ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Abutment Pressure ◽

Strain Curve ◽

Fiber Bragg Grating Sensor ◽

Good Effect ◽

Bragg Grating ◽

Fiber Grating ◽

Supporting Pressure ◽

Geological Conditions ◽

Bragg Grating Sensor

In order to study the regularity of overburden deformation and mining pressure changes in the stope. Take the geological conditions of Hanglaiwan coal mine in Yushen mining area as the background, a 3000 mm×1340 mm×200 mm physical similar material model was established in laboratory. Eight fiber Bragg grating sensors were embedded in the model, used to monitor the movement and deformation of the overburden key stratum and the change of mining abutment pressure in real time and then to determine the influencing factors and strain transfer coefficients of the fiber grating through theoretical analysis and calibration experiments. The results show the following. (1) The changes in value, position, and shape of the strain can reflect the dynamic evolution process of bending deformation, breaking, and rotation of the key strata. When the key layer breaks for the first time, the strain curve shows a peak shape; when the key layer breaks periodically, the strain curve of the fiber grating sensor showed a plateau shape for a period of time. (2) The strain curve has a good corresponding relationship with the change in supporting pressure. When the strain curve of the fiber Bragg grating sensor was at the trough stage, the abutment pressure was at the peak stage, with the increase of sensor buried height, and the supporting pressure and the strain value had a linear relationship within the range of the advanced abutment pressure. The conclusion shows that the fiber Bragg grating sensor monitoring technology has good effect on the internal strain and key supporting pressure monitoring of the overburden in the model test; it provides new monitoring methods and means for the model tests.

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Errata: Method to athermalize a long-period fiber grating for interrogation of fiber Bragg grating–based sensors

Optical Engineering ◽

10.1117/1.oe.53.10.109801 ◽

2014 ◽

Vol 53 (10) ◽

pp. 109801 ◽

Cited By ~ 1

Author(s):

Venkata Reddy Mamidi ◽

Srimannarayana Kamineni ◽

L. N. Sai Prasad Ravinuthala ◽

Venkatapparao Thumu ◽

Vengal Rao Pachava

Keyword(s):

Fiber Bragg Grating ◽

Bragg Grating ◽

Fiber Grating ◽

Long Period Fiber Grating ◽

Long Period ◽

Period Fiber Grating

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Speed Estimation of a Three Phase Induction Motor Using Stator Dynamic Strain Measurement by Fiber Bragg Grating Sensor based in SVR

10.1109/imoc53012.2021.9624775 ◽

2021 ◽

Author(s):

Rafael Mancuso Paraiso Cavalcanti ◽

Jaqueline Bierende ◽

Beatriz Brusamarello ◽

Jean Carlos Cardozo Da Silva ◽

Giovanni Alfredo Guarneri ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Induction Motor ◽

Strain Measurement ◽

Fiber Bragg Grating Sensor ◽

Dynamic Strain ◽

Bragg Grating ◽

Speed Estimation ◽

Three Phase ◽

Bragg Grating Sensor

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Research on Temperature Compensation of the Fiber Bragg Grating Sensor and the Resistance Strain Gauge

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2021.3041 ◽

2021 ◽

Vol 16 (6) ◽

pp. 1020-1027

Author(s):

Feng Zhu ◽

Min Liu ◽

Chengjun Xu ◽

Sheng Zou ◽

Chentong Chen ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Strain Gauge ◽

Temperature Compensation ◽

Metal Structure ◽

Resistance Strain ◽

Fiber Bragg Grating Sensor ◽

Bragg Grating ◽

Resistance Strain Gauge ◽

Strain Monitoring ◽

Bragg Grating Sensor

The fiber Bragg grating sensor is widely used in strain monitoring of large metal structure and trend to replace the resistance strain gauge due to its advantages of strong stability, high measurement accuracy, multiple points measuring, strong environmental suitability and long transmission distance. The temperature-induced strain, which can have the same order of magnitudes as the mechanically-induced strain, will cause great errors in the strain monitoring. Therefore, the temperature compensation for the sensors is essential to guarantee the measurement accuracy. The existing theoretical models and experiment platforms for analyzing the temperature compensation are established by assuming that the testing temperature is constant. However, the surrounding temperature of some large metal structure is not stable, and the effect of temperature change cannot be neglected. This paper aims to establish an analytic model and an experiment platform to compare the temperature compensation of the fiber bragg grating sensor and the resistance strain gauge. The superiority of the temperature compensation for the fiber bragg grating sensor is verified. The result provides theoretical support for choosing the fiber bragg grating sensor in the long-time strain monitoring.

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